Civil Engineering - Concrete Technology - Discussion

4. 

Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor is 0.95, the workability of concrete is

[A]. extremely low
[B]. very low
[C]. low
[D]. high
[E]. none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Amal Ranjan said: (Apr 12, 2013)  
Higher compaction factor implies higher workability.

A mix with good workability compacts easily.

Sudhansu Bhagat said: (Aug 27, 2013)  
Extremely low - 0.65 to 0.68.

Very low - 0.75.

low - 0.83 to 0.85.

Medium - 0.90 to 0.92.

High - 0.95.

Ghassan Kharouf said: (Apr 21, 2014)  
More compaction, means more dense material, otherwise (lower workability).

For a good workability, compaction factor must be between (0.7 - 0.95).

Vishal Dave said: (May 7, 2014)  
The more compaction means more denser concrete and as 1% of air voids reduce strength by 5%, more compaction provides lesser voids which provides good strength.

Mohamed Ahmed Ibrahim said: (Nov 2, 2014)  
In fact partial compaction happens during pouring & when we use vibration or other method of compaction we will get full compaction.

And since the sample obtains 95% i.e. it has high work ability.

Amresh said: (Nov 29, 2014)  
As it goes towards 1 its work ability increases.

Md Saleem Ansari said: (Jan 19, 2015)  
As the ratio between partially compacted and fully compacted concrete increases, the work ability of concrete also increases upto the maximum.

Antony said: (Aug 17, 2016)  
What is meant by wf and wp?

Sushan Bastola said: (Oct 24, 2016)  
wp = wt of partially compacted concrete and wf = wt of fully compacted concrete.

Vishal said: (Nov 17, 2016)  
Agree @MD Saleem Ansari.

Muddasser said: (Dec 19, 2016)  
0.95 is high.

Dhiraj P Chaudhari said: (Jan 3, 2017)  
For a good workability, compaction factor must be between (0.7 - 0.95).
Extremely low - 0.65 to 0.68.
Very low - 0.75.
Low - 0.83 to 0.85.
Medium - 0.90 to 0.92.
High - 0.95.

Ganesh Yadav said: (Feb 15, 2017)  
Please expiain it clearly.

Gurdev Singh said: (Mar 8, 2017)  
Thank you all for the given explanation.

Afajal Afaridi said: (Apr 29, 2017)  
More compaction concrete then high density .95.

Macdonald said: (Jun 14, 2017)  
Thanks for all your help by explaining the solution.

M I Sugur said: (Sep 15, 2017)  
Thanks for all your kind information.

Mohit said: (Dec 25, 2017)  
Higher workability and lower strength.

Kailingtan said: (Jun 23, 2018)  
Why the compaction factor test more suitable for dry mixes?

Alka Gautam said: (Jul 17, 2018)  
Thanks for more explanation.

Apurva said: (Dec 18, 2018)  
Extremely low - 0.65 - 0.68.
Very Low - 0.75.
Low - 0.83 - 0.85.
Medium - 0.90 - 0.92.
High - 0.95.

Sathish said: (Mar 24, 2019)  
Thank you all for explaining.

Pulak Moral said: (Jul 6, 2019)  
0.83, 0.92, 0.95 low medium and high respectively for very low 0.83>0.75 and extremely low 0.75>.

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